Square.



STATES PATENT ICE.

oHARLEs J. BAUMGARTNER, oE RosEvILLE, MICHIGAN.

SQUARE.

Specification of Letters Patent.

Patented Aug. 1, 1905.

Application led April 7, 1905. Serial No. 254,266. i

To rif/ZZ whom it may 'sorteer-n:

Be it known that I, CHARLEs J. BAUMGART- NER, a citizen of the UnitedStates, residing at Roseville, in the county of Macomb and State ofMichigan, have invented new and useful Improvements in Squares, of whichthe following is a specification.

This invention is a combined adjustable pitch-board and square,particularly suitable for laying out stairwork, although capable of usein various other ways and for various other purposes, such as will occurto those skilled in the art to which it relates.

Important features area means for varying the angle of blades attachedto the square to suit different thicknesses of treads or risers instairwork and at the same time give a taper for the wedges used todrive'the tread or riser tight in its position. An adjustable nose isalso provided for laying out the nosings. When the device is properlyadjusted and placed on the Stringer, every mark or line necessary inlaying stairwork can be made,

no templet of any description being necessary.`

Consequently the work can proceed Very rapidly.

In the accompanying drawings, Figure 1 is a plan view of the tool. Fig.2 is an end view of the cross-bar thereof. Fig. 3 is a back view of thecorner of the square, showing the manner of attaching the adjustablenosings. Fig. 4 is a plan view illustrating its manner of use inconneetion with stairwork.

Referring specifically to the drawings, a square is formed of two arms 6in the usual manner. At the corner the arms are recessed on the underside to receive the tongue 8 of a nosing 9, which may be of any desiredsize. The nosing maybe reversed, as. indicated in dotted lines in Fig.3, by loosening the thumbscrew 10, by which it is held in place, and maybe adjusted in or out by means of the slot 9, through which thethumb-screw extends.

A cross-bar or straight-edge is indicated at 7, extending between thearms of the square.

This cross-bar is not permanently attached to the arms, but may beclamped thereto by thumb-screws at 11 and 12, the former eX- tendingthrough one of the slots 13 in the ends of the bar. The bar ispreferably angular in shape, giving a broad liange 14 to rest on'theStringer in stairwork.

15 indicates blades which are attached to the respective arms of thesquare, at the inner edges thereof, by means of slotted links 16 and 17,which permit the blades 15 to be adjusted at any desired angle,withinbounds, to the arms 6 to suit the different widths andinclinations of the treads or risers which are 'to be used 1n the work.

'Thumb-screws 18 fasten the parts at adjustment.

A center guide or blade is indicated at 19, l secu red to the cross-bar7 by the thumb-screw 12, which extends through a slot 2O in'said blade,and by the thumb-screw 10 at the corner of the square. useful incentering circles, squares, or angles and in determining othermeasurements.

The parts permit of very quick adjustment to shift the tool from rightto left hand work, as in laying out opposite stringers, and in additionto the use above referred to has the common uses of a square andpitch-board.

` What I claim as new, and desire to secure by Letters Patent, Iis

1. The combination with a square, of the blades 15 opposite the inneredges of the square, and the slotted links 16 and 17 adjustablyconnecting the ends of each blade with an arm of the square.

2. The combination with a square having a recess at the corner thereofopen on two edges of the square, of a nose-piece having a shank fittingin the recess from either edge of the square, in line with either armthereof.

. In testimony whereof I have signed my name to this specification inthe presence of two subscribing witnesses.

CHARLES J. BAUMGARTN ER. Witnesses:

NORMAN E. MAsKLE, CHARLES PURDY.

This guide or blade is

